Biomass

DTEES Stoneman Plant

Coal Boiler Conversion to Biomass Firing Boiler System

Owner:  Detroit Edison Energy Services (DTEES)

Project Location: Cassville, Wisconsin

Project Completion: June 2010

Project Description:

ESI was selected to provide complete engineering for conversion of the two existing 27 MW pulverized coal fired utility boilers at the DTEES owned Cassville facility to a biomass fired boiler system. The goal of this project is to convert two (2) identical 1950 vintage Riley wall-fired coal boilers to stoker fired biomass units with a total capacity of 47 MW. Modifications to the system include replacing the lower furnace and ash hoppers with a larger furnace, overfire air system, and installation of a new water-cooled vibrating grate stoker system. The upgrade also required replacement of all the existing fans and air heaters and economizers, a complete new fuel receiving handling system, air quality control systems, and upgrades for the electrical and controls systems.